A least tern checks her two eggs on the beach in Gulfport, Mississippi. File/AP
Gulf Today Report
The interior least tern, a hardy Midwestern bird that survived a craze for its plumage and dam-building that destroyed much of its habitat, has soared off the endangered species list.
Federal officials said on Tuesday that 35 years of legal protection and habitat restoration efforts had brought the tern back from the brink of extinction.
"Dozens of states, federal agencies, tribes, businesses and conservation groups have worked tirelessly over the course of three decades to successfully recover these birds,” US Fish and Wildlife Service Aurelia Skipwith said.
The smallest members of the tern family, weighing less than 2 ounces (56 grammes), they feed mostly on small fish and build nests on the ground. While most least terns are considered seabirds, some species live by rivers, lakes and wetlands.
Their most important nesting areas are along more than 2,800 miles (4,500 kilometres) of river channels in the Great Plains and the Lower Mississippi Valley. They migrate to the Caribbean and South America for the winter.
Their numbers plummeted in the late 19th and early 20th centuries when their feathers became a popular feature of women's hats, according to Associated Press.
Then came a wave of dam and levee construction and other engineering measures to control Middle America's great rivers - particularly the Missouri and the Mississippi. Those structures wiped out much of the bird's shoreline habitat.
When listed as endangered in 1985 as a distinct population segment, fewer than 2,000 interior least terns remained, along with a few dozen nesting sites.
The Army Corps of Engineers played a key role in the bird's recovery, changing river management strategies and placing dredged material to create new nesting and dwelling spots for terns and other imperilled shorebirds such as the piping plover.
The steps paid off. The interior least tern's population is now estimated at more than 18,000, with about 480 nesting sites available in 18 states.
The Endangered Species Act requires the Fish and Wildlife Service to monitor the tern for at least five years to make sure its numbers remain stable.
The Corps and the Fish and Wildlife Service teamed with the American Bird Conservancy to develop a computer modelling system to track the bird's status with and without continued management in certain areas.
Environmental groups that sometimes have opposed dropping species from the endangered list supported the removal of the interior least tern.
"We consider it an Endangered Species Act success story for sure,” said Noah Greenwald of the Centre for Biological Diversity.
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